Battery and electric device

Abstract

The present application belongs to the technical field of batteries. Provided are a battery and an electric device. The battery comprises a battery module, safety devices and a sampling assembly. The battery module comprises busbar components and a plurality of battery cells, wherein the busbar components are electrically connected to the plurality of battery cells. The safety devices and the busbar components are stacked in a first direction. Sampling wires of the sampling assembly are electrically connected to the busbar components by means of the safety devices. Each safety device comprises an electrically conductive layer and a first insulating layer, wherein the electrically conductive layer comprises a first electrically conductive region, a fuse and a second electrically conductive region, which are connected in sequence, the first electrically conductive region and the second electrically conductive region being spaced apart from each other, the first electrically conductive region and the second electrically conductive region being respectively connected to one busbar component and one sampling wire, and at least part of the first insulating layer being located between the second electrically conductive region and the busbar component so as to insulate and isolate the second electrically conductive region from the busbar component. An increase in the creepage distance between the second electrically conductive regions and the busbar components is facilitated, so as to reduce risks such as failure of the safety devices, or short circuits caused by an accidental overlap between the second electrically conductive regions and the busbar components.

Description

Battery and electric device Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application 2024214828929, filed on June 26, 2024, entitled “Battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0003] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, the battery as a core component of new energy vehicles has higher requirements in terms of use stability and use reliability.

[0004] In the battery technology, in order to ensure the safety of the battery monomer, a sampling assembly is generally arranged in the battery, which can collect the voltage of the battery monomer during use, so as to obtain the use condition of the battery. However, the existing sampling assembly or battery monomer in the battery often appears to be damaged during use, resulting in poor use stability of the battery and short service life. SUMMARY

[0005] The embodiments of the present application provide a battery and an electric device, which can effectively improve the use stability and service life of the battery.

[0006] In a first aspect, the embodiments of the present application provide a battery, comprising a battery module, a fuse device and a sampling assembly; the battery module comprises a busbar component and a plurality of battery monomers, and the busbar component is electrically connected to the plurality of battery monomers; the fuse device and the busbar component are stacked along a first direction; the sampling assembly has a sampling line, and the sampling line is electrically connected to the busbar component through the fuse device; wherein the fuse device comprises a conductive layer and a first insulating layer, the conductive layer comprises a first conductive area, a fuse and a second conductive area, the first conductive area and the second conductive area are arranged at intervals, the first conductive area is connected to the busbar component, the second conductive area is connected to the sampling line, the fuse connects the first conductive area and the second conductive area, and at least part of the first insulating layer is located between the second conductive area and the busbar component along the first direction, so as to insulate and separate the second conductive area and the busbar component.

[0007] In the technical scheme, the fuse device is arranged on the busbar component of the battery module, and the sampling line of the sampling assembly is electrically connected to the busbar component through the fuse device, so that the sampling assembly can acquire and sample the voltage of the battery module, thereby obtaining the use condition of the battery. The fuse device comprises a conductive layer and a first insulating layer. The conductive layer comprises a first conductive area, a fuse and a second conductive area connected in sequence. The first conductive area and the second conductive area are connected to the busbar component and the sampling line, respectively, so that the sampling line of the sampling assembly can be electrically connected to the busbar component through the conductive layer. In this way, when the battery module or the sampling assembly is short-circuited, the fuse of the conductive layer can be melted to disconnect the electrical connection between the first conductive area and the second conductive area, so that the battery module and the sampling assembly can be disconnected to prevent further damage to the battery module or the sampling assembly. On the other hand, the first insulating layer is arranged between the conductive layer and the busbar component, so that the first insulating layer can separate the second conductive area and the busbar component, thereby increasing the creepage distance between the second conductive area and the busbar component to reduce the risk of failure or short circuit of the fuse device caused by misconnection between the second conductive area and the busbar component, thereby effectively improving the use stability and service life of the battery.

[0008] In some embodiments, the projection of the fuse device in the first direction is located within the busbar component.

[0009] In the technical scheme, the projection of the fuse device in the first direction is located within the busbar component. On the one hand, this can improve the assembly stability of the fuse device arranged on the busbar component to reduce the risk of the fuse device falling off and alleviate the knocking phenomenon between the fuse device and other components. On the other hand, this can reduce the misconnection phenomenon between the conductive layer of the fuse device and other components to reduce the risk of internal short circuit of the battery during use, thereby improving the use reliability of the battery.

[0010] In some embodiments, the fuse device further comprises a second insulating layer; the second insulating layer is arranged in a stack with the first insulating layer along the first direction and is connected to the first insulating layer; and along the first direction, the conductive layer is arranged between the first insulating layer and the second insulating layer.

[0011] In the technical scheme, the safety device is further provided with a second insulating layer, and the first insulating layer and the second insulating layer are in a structure of being stacked along the first direction and being connected, so that the first insulating layer and the second insulating layer can clamp and assemble the conductive layer. In this way, on one hand, the conductive layer is formed with the insulating structure on both sides in the first direction, which is beneficial to further increase the creepage distance between the conductive layer and other components and to further reduce the lap phenomenon between the conductive layer and other components, so as to further reduce the risk of internal short circuit of the battery in use and to improve the use reliability of the battery. On the other hand, the first insulating layer and the second insulating layer can stabilize the conductive layer, which is beneficial to further improve the assembly stability of the safety device on the busbar component.

[0012] In some embodiments, a gap is formed between the first conductive region and the second conductive region; and in the first direction, the first insulating layer and the second insulating layer are connected to each other in a region corresponding to the gap, so as to separate the first conductive region and the second conductive region.

[0013] In the technical scheme, the first insulating layer and the second insulating layer are connected to each other in the part corresponding to the gap between the first conductive region and the second conductive region in the first direction, so that the first insulating layer and the second insulating layer can further insulate and separate the first conductive layer and the second conductive layer. In this way, the physical spacing between the first conductive region and the second conductive region can be achieved, and the creepage distance between the first conductive region and the second conductive region can be increased, so as to alleviate the mislap phenomenon of the first conductive region and the second conductive region and to reduce the risk of failure of the safety device.

[0014] In some embodiments, the edge region of the first insulating layer and the edge region of the second insulating layer are connected to each other, and the first insulating layer and the second insulating layer jointly define a containing space, and the conductive layer is contained in the containing space.

[0015] In the technical scheme, the edge region of the first insulating layer and the edge region of the second insulating layer are connected to each other, so that the first insulating layer and the second insulating layer can jointly form a containing space for containing the conductive layer. In this way, on one hand, the lap phenomenon between the conductive layer and other components can be further reduced, so as to further reduce the risk of internal short circuit of the battery in use and to improve the use reliability of the battery. On the other hand, the stability of the first insulating layer and the second insulating layer to the conductive layer is further improved, which is beneficial to improve the structural stability of the safety device and to further improve the assembly stability of the safety device on the busbar component.

[0016] In some embodiments, the first insulating layer is provided with a first window configured to expose a portion of the first conductive region, and the exposed portion of the first conductive region is connected to the busbar component.

[0017] In the above technical solution, the first insulating layer is provided with a first window, and the first window can expose a portion of the first conductive region of the conductive layer in the first direction, thereby facilitating the connection between the busbar component and the exposed region of the first conductive region, reducing the difficulty of connecting the busbar component and the first conductive region, and improving the connection quality between the busbar component and the first conductive region.

[0018] In some embodiments, the projection of the first window in the first direction is located within the first conductive region.

[0019] In the above technical solution, by setting the projection of the first window in the first direction entirely within the first conductive region, on the one hand, the phenomenon of the exposed region of the first conductive region being too large can be alleviated, thereby reducing the risk of lap joint between the first conductive region and other components, and on the other hand, the phenomenon of the edge of the first conductive region being exposed can be alleviated, thereby improving the stability of the first conductive region when being assembled between the first insulating layer and the second insulating layer, and reducing the risk of the first conductive region falling off from the first window.

[0020] In some embodiments, the first conductive region is welded to the busbar component, the second insulating layer is provided with a second window configured to expose a portion of the first conductive region, and the projection of the second window in the first direction at least partially overlaps with the projection of the first window in the first direction.

[0021] In the above technical solution, by providing the second insulating layer with a second window capable of exposing a portion of the first conductive region, and the projection of the second window in the first direction at least partially located within the first window, the first conductive region and the busbar component can be welded from the side of the first conductive region away from the busbar component and corresponding to the position of the second window, thereby reducing the difficulty of welding the first conductive region and the busbar component to each other, improving the assembly efficiency of the battery, and eliminating the need to penetrate the second insulating layer when welding the first conductive region and the busbar component, thereby reducing the welding power required for welding the first conductive region and the busbar component, and effectively improving the welding quality between the first conductive region and the busbar component.

[0022] In some embodiments, the projection of the second window in the first direction coincides with the projection of the first window in the first direction.

[0023] In the technical solution, the second window and the first window are arranged to be projected to coincide in the first direction, so that the second window and the first window do not need to be positioned to overlap in the first direction when the first conductive area and the busbar component are welded, which helps to further reduce the difficulty of welding the first conductive area and the busbar component together, thereby improving the assembly efficiency of the battery.

[0024] In some embodiments, along the first direction, a projection of the second window is located in the first conductive area.

[0025] In the technical solution, the projection of the second window in the first direction is arranged to be located in the first conductive area, which can alleviate the phenomenon that the exposed area of the first conductive area is too large, thereby reducing the risk of overlap between the first conductive area and other components, and can also alleviate the phenomenon that the edge of the first conductive area is exposed, which helps to improve the stability of the first conductive area when it is assembled between the first insulating layer and the second insulating layer, thereby reducing the risk of the first conductive area falling off from the second window.

[0026] In some embodiments, the second insulating layer is provided with a third window, and the third window is configured to expose part of the second conductive area, and the exposed part of the second conductive area is connected to the sampling line.

[0027] In the technical solution, the second insulating layer is provided with a third window, and the third window can expose part of the second conductive area of the conductive layer in the first direction, thereby facilitating the connection between the sampling line and the exposed area of the second conductive area, which helps to reduce the connection difficulty between the sampling line and the second conductive area and improve the connection quality between the sampling line and the second conductive area.

[0028] In some embodiments, along the first direction, a projection of the third window is located in the second conductive area.

[0029] In the technical solution, the projection of the third window in the first direction is arranged to be located in the second conductive area, which can alleviate the phenomenon that the exposed area of the second conductive area is too large, thereby reducing the risk of overlap between the second conductive area and other components, and can also alleviate the phenomenon that the edge of the second conductive area is exposed, which helps to improve the stability of the second conductive area when it is assembled between the first insulating layer and the second insulating layer, thereby reducing the risk of the second conductive area falling off from the third window.

[0030] In some embodiments, the first insulating layer and the second insulating layer are thermally compounded and connected.

[0031] In the technical solution, the first insulating layer and the second insulating layer are connected by thermal composite connection, which can improve the connection reliability of the first insulating layer and the second insulating layer, improve the structural stability and reliability of the conductive layer arranged between the first insulating layer and the second insulating layer, and reduce the assembly difficulty of the first insulating layer and the second insulating layer, thereby improving the assembly efficiency of the safety device.

[0032] In some embodiments, the first conductive region is welded to the busbar component, and the second conductive region is welded to the sampling line.

[0033] In the technical solution, the first conductive region and the busbar component are welded to each other, which can improve the connection reliability between the first conductive region and the busbar component, reduce the risk of failure of the safety device caused by the disconnection of the first conductive region and the busbar component, and improve the overcurrent capacity between the first conductive region and the busbar component. Similarly, the second conductive region and the sampling line are welded to each other, which can improve the connection reliability between the second conductive region and the sampling line, reduce the risk of failure of the safety device caused by the disconnection of the second conductive region and the sampling line, and improve the overcurrent capacity between the second conductive region and the sampling line.

[0034] In some embodiments, the conductive layer includes a first foil and a second foil connected in the first direction, the first foil is located on the side of the second foil facing the busbar component in the first direction, the first foil is welded to the part of the first conductive region and the busbar component, and the second foil is welded to the part of the second conductive region and the sampling line; wherein the material of the busbar component is different from the material of the sampling line, the material of the first foil is the same as the material of the busbar component, and the material of the second foil is the same as the material of the sampling line.

[0035] In the technical scheme, the conductive layer is provided with the first foil and the second foil which are connected in the first direction, and the first foil is located on the side of the second foil facing the busbar component in the first direction. By setting the material of the first foil to be the same as that of the busbar component, and by welding the part of the first foil located in the first conductive area to the busbar component, the first conductive area and the busbar component are welded in the same material. Similarly, by setting the material of the second foil to be the same as that of the sampling line, and by welding the part of the second foil located in the second conductive area to the sampling line, the second conductive area and the sampling line are welded in the same material. On the one hand, the welding difficulty between the first conductive area and the busbar component and between the second conductive area and the sampling line is reduced. On the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, and the welding quality between the first conductive area and the busbar component and between the second conductive area and the sampling line is improved.

[0036] In some embodiments, the materials of the conductive layer, the busbar component and the sampling line are the same.

[0037] In the technical scheme, the conductive layer, the busbar component and the sampling line are all set to the same material, so that the first conductive area and the busbar component and the second conductive area and the sampling line are all welded in the same material. On the one hand, the welding difficulty between the first conductive area and the busbar component and between the second conductive area and the sampling line is reduced. On the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, and the welding quality between the first conductive area and the busbar component and between the second conductive area and the sampling line is improved.

[0038] In some embodiments, the material of the busbar component is different from that of the sampling line, the material of the first conductive area is the same as that of the busbar component, and the material of the second conductive area is the same as that of the sampling line.

[0039] In the technical scheme, the material of the first conductive area of the conductive layer is set to be the same as that of the busbar component, and the material of the second conductive area of the conductive layer is set to be the same as that of the sampling line, so that the first conductive area and the busbar component are welded in the same material, and the second conductive area and the sampling line are welded in the same material. On the one hand, the welding difficulty between the first conductive area and the busbar component and between the second conductive area and the sampling line is reduced. On the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, and the welding quality between the first conductive area and the busbar component and between the second conductive area and the sampling line is improved.

[0040] In some embodiments, the first conductive region comprises a first portion, a second portion and a third portion connected in sequence, the first portion and the third portion are oppositely arranged along a second direction, and the second direction is perpendicular to the first direction.

[0041] In the technical solution, the first conductive region is arranged as the first portion, the second portion and the third portion connected in sequence, and the first portion and the third portion are oppositely arranged along the second direction to form the first conductive region in the shape of "C". The fuse device with the structure can increase the effective welding area between the first conductive region of the conductive layer and the busbar component, and further improve the assembly stability of the fuse device arranged on the busbar component.

[0042] In some embodiments, along the second direction, the second conductive region is located between the first portion and the third portion, and the two ends of the fuse are connected to the second conductive region and the third portion, respectively.

[0043] In the technical solution, the second conductive region of the conductive layer is arranged between the first portion and the third portion along the second direction, so that the second conductive region is located on the inner side of the first conductive region. The fuse device with the structure can optimize the space occupied by the conductive layer, improve the overall structural strength of the fuse device, and reduce the difficulty of connecting the first conductive region and the second conductive region of the fuse, thereby reducing the manufacturing difficulty of the conductive layer.

[0044] In some embodiments, along the first direction, the busbar component is connected to one side of the battery monomer, and the fuse device is arranged on the side of the busbar component away from the battery monomer.

[0045] In the technical solution, the busbar component is connected to one side of the battery monomer along the first direction, and the fuse device is arranged on the side of the busbar component away from the battery monomer along the first direction. This facilitates the assembly of the fuse device and the busbar component, and reduces the connection difficulty between the sampling line and the fuse device, thereby improving the assembly efficiency of the battery.

[0046] In a second aspect, the embodiments of the present application further provide a power utilization device comprising the battery described above, and the battery is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0048] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0049] Fig. 2 is an exploded structural diagram of a battery according to some embodiments of the present application;

[0050] Fig. 3 is a top view of a battery module and a sampling assembly according to some embodiments of the present application;

[0051] Fig. 4 is a partial enlarged view of A in Fig. 3;

[0052] Fig. 5 is a partial structural schematic diagram of a battery module according to some embodiments of the present application;

[0053] Fig. 6 is an assembly schematic diagram of a busbar component and a fuse device according to some embodiments of the present application;

[0054] Fig. 7 is a structural schematic diagram of a fuse device according to some embodiments of the present application;

[0055] Fig. 8 is an exploded structural diagram of a fuse device according to some embodiments of the present application;

[0056] Fig. 9 is a structural schematic diagram of a conductive layer of a fuse device according to some embodiments of the present application;

[0057] Fig. 10 is a front view of a fuse device facing a first insulating layer in a first direction according to some embodiments of the present application;

[0058] Fig. 11 is a front view of a fuse device facing a second insulating layer in a first direction according to some embodiments of the present application;

[0059] Fig. 12 is a sectional view of a conductive layer of a fuse device perpendicular to a second direction according to some embodiments of the present application.

[0060] Fig. 12 is a sectional view of a conductive layer of a fuse device perpendicular to a second direction according to some embodiments of the present application. DETAILED DESCRIPTION

[0061] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0062] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0063] In the present application, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0064] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0066] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0067] As used herein, "a plurality of" means two or more (including two).

[0068] In embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material through charging after discharging the battery cell.

[0069] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0070] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, and can function to prevent short circuiting of the positive and negative electrodes, while allowing the active ions to pass through.

[0071] In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0072] As an example, the positive electrode current collector has two surfaces opposite in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0073] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a high molecular material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a high molecular material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0074] As an example, the positive active material can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive active material can also be used. These positive active materials can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (may also be referred to as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (may also be referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (may also be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (may also be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (may also be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (may also be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and modified compounds thereof, etc.

[0075] In some embodiments, the positive electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. When the foamed metal is used as the positive electrode, the surface of the foamed metal can not be provided with a positive active material, or of course can be provided with a positive active material. As an example, the foamed metal can also be filled or / and deposited with a lithium source material, a potassium metal, or a sodium metal, the lithium source material being a lithium metal and / or a lithium-rich material.

[0076] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0077] As an example, the negative current collector can employ a metal foil, a foamed metal, or a composite current collector. For example, as the metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, nickel, or titanium, etc. can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0078] As an example, the negative electrode sheet can include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0079] As an example, the negative current collector has two surfaces opposite in the thickness direction thereof, and the negative active material is disposed on either one or both of the two opposite surfaces of the negative current collector.

[0080] As an example, the negative active material can employ a negative active material for a battery cell known in the art. As an example, the negative active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative active material can also be used. These negative active materials can be used alone only one or in combination of two or more.

[0081] In some embodiments, the material of the positive current collector can be aluminum, and the material of the negative current collector can be copper.

[0082] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0083] In some embodiments, the separator is a separator film. The type of the separator film can be various, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0084] As an example, the material of the separator film can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator film can be a single layer film or a multi-layer composite film. When the separator film is a multi-layer composite film, the materials of the layers can be the same or different. The separator can be a separate component located between the positive and negative electrodes or can be attached to the surface of the positive and negative electrodes.

[0085] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive and negative electrodes and functions to transport ions and separate the positive and negative electrodes.

[0086] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The electrolyte can be in a liquid, gel, or solid state. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0087] In some embodiments, the electrolyte salt can include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonylimide, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoroboric oxalate, lithium bisoxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorodioxalate phosphate.

[0088] In some embodiments, the solvent can include at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, butanediol sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether solvent. The ether solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ether.

[0089] Among them, the gel electrolyte includes a polymer as a skeleton network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0090] Among them, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0091] As an example, the polymer solid-state electrolyte can be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single-ion polymer, a polyionic liquid-lithium salt, cellulose, etc.

[0092] As an example, the inorganic solid-state electrolyte can include one or more of an oxide solid-state electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON thin film), a sulfide solid-state electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorous sulfide, argyrodite), amorphous sulfide), and a halide solid-state electrolyte, a nitride solid-state electrolyte, and a hydride solid-state electrolyte.

[0093] As an example, the composite solid-state electrolyte is formed by adding an inorganic solid-state electrolyte filler to a polymer solid-state electrolyte.

[0094] In some embodiments, the electrode assembly is in a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound into the jelly-roll structure.

[0095] In some embodiments, the electrode assembly is in a stack structure.

[0096] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked.

[0097] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet is folded to form a plurality of folded segments that are stacked. One positive electrode sheet is clamped between adjacent folded segments.

[0098] As an example, the positive electrode sheet and the negative electrode sheet are both folded to form a plurality of folded segments that are stacked.

[0099] As an example, a plurality of separators can be provided, and each of the plurality of separators is provided between any adjacent positive electrode sheet or negative electrode sheet.

[0100] As an example, the separators can be continuously provided, and are provided between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0101] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a multi-prism shape, etc.

[0102] In some embodiments, the electrode assembly can be provided with tabs. The tabs can guide current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0103] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0104] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes, but is not limited to, a square battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, and a multi-prismatic battery cell such as a hexagonal battery cell, etc.

[0105] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery monomers to provide higher voltage and capacity.

[0106] In some embodiments, the battery can be a battery module, and when there are multiple battery monomers, the multiple battery monomers are arranged and fixed to form a battery module.

[0107] In some embodiments, the battery can be a battery pack, and the battery pack includes a box body and battery monomers, and the battery monomers or battery modules are accommodated in the box body.

[0108] In some embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0109] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0110] The battery has the outstanding advantages of high energy density, small environmental pollution, large power density, long service life, wide adaptation range, and small self-discharge coefficient, and is an important part of the development of new energy today. The development of battery technology needs to consider many design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and in addition, the safety of the battery also needs to be considered.

[0111] For a general battery monomer, the battery includes a box body and a plurality of battery monomers arranged in the box body, and the plurality of battery monomers are electrically connected through a busbar component to realize series connection or parallel connection between the plurality of battery monomers. In the related art, in order to ensure the safety of the battery monomer, a sampling assembly is generally arranged in the battery, and the sampling line of the sampling assembly is connected with the busbar component, so that the sampling assembly can collect the voltage of the battery monomer during use, so as to obtain the use condition of the battery. However, the battery with such a structure is extremely easy to cause the sampling assembly to be damaged when short circuit occurs between the plurality of battery monomers, or the battery monomer and the loop between the battery monomers are extremely easy to be damaged when short circuit occurs in the sampling assembly, thereby resulting in poor use stability and short service life of the battery.

[0112] In view of the above, in order to solve the problems of poor use stability and short service life of the battery, the application provides a battery, which comprises a battery module, a fuse device and a sampling assembly. The battery module comprises a busbar component and a plurality of battery cells, and the busbar component is electrically connected to the plurality of battery cells. The fuse device is stacked with the busbar component along a first direction. The sampling assembly has a sampling line, and the sampling line is electrically connected to the busbar component through the fuse device. The fuse device comprises a conductive layer and a first insulating layer. The conductive layer comprises a first conductive region, a fuse and a second conductive region. The first conductive region and the second conductive region are spaced apart. The first conductive region is connected to the busbar component. The second conductive region is connected to the sampling line. The fuse connects the first conductive region and the second conductive region. Along the first direction, at least part of the first insulating layer is located between the second conductive region and the busbar component, so as to insulate and separate the second conductive region and the busbar component.

[0113] In the battery with the above structure, the busbar component of the battery module is provided with the fuse device, and the sampling line of the sampling assembly is electrically connected to the busbar component through the fuse device, so that the sampling assembly can acquire and sample the voltage of the battery module, so as to obtain the use condition of the battery. The fuse device is provided with a conductive layer and a first insulating layer. The conductive layer comprises a first conductive region, a fuse and a second conductive region connected in sequence. The first conductive region and the second conductive region are connected to the busbar component and the sampling line respectively, so that the sampling line of the sampling assembly can be electrically connected to the busbar component through the conductive layer. In the battery with the above structure, on the one hand, when the battery module is short-circuited or the sampling assembly is short-circuited, the fuse of the conductive layer can be fused, so as to disconnect the electrical connection between the first conductive region and the second conductive region, thereby achieving the disconnection of the battery module and the sampling assembly, so as to alleviate the phenomenon that the battery module or the sampling assembly is further damaged. On the other hand, by arranging the first insulating layer between the conductive layer and the busbar component, the first insulating layer can separate the second conductive region and the busbar component, so as to facilitate the increase of the creepage distance between the second conductive region and the busbar component, so as to reduce the risk of failure or short circuit of the fuse device caused by the mislapped connection between the second conductive region and the busbar component, thereby effectively improving the use stability and service life of the battery.

[0114] The battery disclosed in the application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. The power supply system of the electric device can be composed of the battery disclosed in the application. In this way, the problem that the battery cell or the sampling assembly is damaged during use of the battery can be alleviated, so as to improve the use stability and service life of the battery.

[0115] The embodiments of the present application provide a power consumption device using a battery as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric aircraft toy, and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft.

[0116] The following embodiments are described by taking a power consumption device as a vehicle as an example for the convenience of description.

[0117] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom of the vehicle 1000, at the head of the vehicle 1000 or at the tail of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000, for example, the battery 100 can be used as an operating power supply or a use power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0118] In some embodiments of the present application, the battery 100 can not only be used as an operating power supply or a use power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0119] Referring to FIG. 2 and FIG. 3, FIG. 2 is an exploded view of the battery 100 provided by some embodiments of the present application, and FIG. 3 is a top view of the mutual assembly of a battery module 20 and a sampling assembly 30 provided by some embodiments of the present application. The battery 100 includes a box body 10 and at least one battery module 20, the battery module 20 is accommodated in the box body 10, and the battery module 20 includes a plurality of battery monomers 21 stacked along a second direction Y.

[0120] The box 10 is configured to provide an assembly space for the battery module 20. The box 10 can have various structures. In some embodiments, the box 10 can include a first box body 11 and a second box body 12. The first box body 11 and the second box body 12 are overlapped with each other along a first direction X, and the first box body 11 and the second box body 12 together define an assembly space for accommodating the battery module 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate structure. The first box body 11 is overlapped with the open side of the second box body 12, so that the first box body 11 and the second box body 12 together define the assembly space. Alternatively, the first box body 11 and the second box body 12 can both be hollow structures with one side open, and the open side of the first box body 11 is overlapped with the open side of the second box body 12.

[0121] Of course, the box 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, a square, etc. For example, as shown in FIG. 2, the box 10 has a cuboid shape.

[0122] It should be noted that in some embodiments, the battery 100 can not be provided with the box 10. The battery 100 includes one or more battery modules 20, and the battery 100 composed of one or more battery modules 20 can be directly assembled to the electric device to provide electric energy for the electric device by the plurality of battery cells 21 in the battery module 20. That is, the box 10 can be part of the electric device. Taking the vehicle 1000 as an example, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0123] Optionally, in the battery 100, the battery module 20 accommodated in the box 10 can be one or more. When the battery module 20 provided in the box 10 is more than one, the plurality of battery modules 20 can be in series, in parallel, or in a mixed connection. The mixed connection means that the plurality of battery modules 20 are connected in series and in parallel. The plurality of battery modules 20 can be directly connected in series, in parallel, or in a mixed connection, and the whole of the plurality of battery modules 20 is accommodated in the box 10.

[0124] For example, as shown in FIGS. 2 and 3, the battery 100 includes two battery modules 20. The two battery modules 20 are arranged side by side along a third direction Z, and the two battery modules 20 are connected in series. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0125] In FIGS. 2 and 3, each battery module 20 includes a busbar component 22 and a plurality of battery cells 21 stacked along a second direction Y, the busbar component 22 is located on one side of the plurality of battery cells 21 in a first direction X, and the busbar component 22 is used to connect the plurality of battery cells 21 to achieve electrical connection between the plurality of battery cells 21. Exemplarily, the first direction X is the height direction of the battery cell 21, the second direction Y is the thickness direction of the battery cell 21, and the third direction Z is the length direction of the battery cell 21.

[0126] Referring to FIG. 3, and further referring to FIGS. 4 and 5, FIG. 4 is a partial enlarged view of position A of the battery module 20 and the sampling assembly 30 after being assembled with each other, and FIG. 5 is a partial structural schematic view of the battery module 20 provided by some embodiments of the present application. The battery cell 21 is provided with two electrode terminals 211 at one end in the first direction X, the polarities of the two electrode terminals 211 are opposite, and the two electrode terminals 211 are respectively used to input or output the positive and negative electrodes of the battery cell 21. The busbar component 22 is connected with the electrode terminals 211 of the battery cell 21 to electrically connect the plurality of battery cells 21. It should be noted that the plurality of battery cells 21 in the battery module 20 can be in series or parallel connection, and exemplarily, in FIG. 3, the plurality of battery cells 21 in the battery module 20 are in series connection through the plurality of busbar components 22.

[0127] Optionally, each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 can be in the shape of a cuboid, a cylinder, a prism, or other shapes. Exemplarily, in FIG. 2, the battery cell 21 is in the shape of a cuboid.

[0128] In some embodiments, referring to FIGS. 2, 3, and 4, the battery 100 can further include a sampling assembly 30, the sampling assembly 30 is arranged in the box body 10, the sampling assembly 30 is used to be electrically connected with the battery management system of the battery 100, the sampling assembly 30 has a sampling line 31, the sampling line 31 is electrically connected with the busbar component 22 to obtain the voltage of the battery cell 21.

[0129] The busbar component 22 is provided with a fuse device 40, the sampling line 31 of the sampling assembly 30 is electrically connected with the busbar component 22 through the fuse device 40, and the fuse device 40 is configured to be disconnected when the battery module 20 or the sampling assembly 30 is short-circuited, so as to disconnect the electrical connection between the sampling line 31 and the busbar component 22.

[0130] According to some embodiments of the present application, referring to FIG. 2, FIG. 4 and FIG. 5, and further referring to FIG. 6, FIG. 7 and FIG. 8, FIG. 6 is an assembly schematic diagram of the busbar component 22 and the fuse device 40 according to some embodiments of the present application, FIG. 7 is a structural schematic diagram of the fuse device 40 according to some embodiments of the present application, and FIG. 8 is an exploded view of the fuse device 40 according to some embodiments of the present application. The present application provides a battery 100, which includes a battery module 20, a fuse device 40 and a sampling assembly 30. The battery module 20 includes a busbar component 22 and a plurality of battery cells 21, and the busbar component 22 is electrically connected to the plurality of battery cells 21. The fuse device 40 is stacked with the busbar component 22 along a first direction X. The sampling assembly 30 has a sampling line 31, and the sampling line 31 is electrically connected to the busbar component 22 through the fuse device 40. The fuse device 40 includes a conductive layer 41 and a first insulating layer 42, the conductive layer 41 includes a first conductive area 411, a fuse 412 and a second conductive area 413, the first conductive area 411 is spaced apart from the second conductive area 413, the first conductive area 411 is connected to the busbar component 22, the second conductive area 413 is connected to the sampling line 31, the fuse 412 connects the first conductive area 411 and the second conductive area 413, and at least part of the first insulating layer 42 is located between the second conductive area 413 and the busbar component 22 along the first direction X to insulate and separate the second conductive area 413 and the busbar component 22.

[0131] In the battery module 20, the busbar component 22 serves as an electrode terminal 211 for electrically connecting the plurality of battery cells 21, and the material of the busbar component 22 can be various, such as copper, aluminum or alloy, etc.

[0132] The fuse device 40 is stacked with the busbar component 22 along the first direction X, that is, the fuse device 40 is arranged on one side of the busbar component 22 in the first direction X. For example, in FIG. 4 and FIG. 5, the busbar component 22 is connected to one side of the battery cell 21 in the first direction X, and the fuse device 40 is arranged on the side of the busbar component 22 in the first direction X away from the battery cell 21. Of course, in other embodiments, the fuse device 40 can also be arranged on the side of the busbar component 22 in the first direction X facing the battery cell 21.

[0133] The sampling assembly 30 has a sampling line 31, and the sampling line 31 is electrically connected to the busbar component 22 through the fuse device 40, that is, the sampling assembly 30 has a sampling line 31 for mutual connection with the fuse device 40. It should be noted that the sampling assembly 30 can be used to obtain the voltage of the battery module 20, or can be used to obtain the current of the sampling assembly 30. The specific structure of the sampling assembly 30 can refer to related technologies, which will not be described here.

[0134] Optionally, the sampling assembly 30 can include a plurality of sampling lines 31, and each sampling line 31 is electrically connected to a busbar 22 through a fuse device 40.

[0135] The conductive layer 41 includes a first conductive area 411, a fuse 412, and a second conductive area 413, the first conductive area 411 is spaced apart from the second conductive area 413, that is, the first conductive area 411 and the second conductive area 413 of the conductive layer 41 are in a structure of not contacting each other, and the first conductive area 411 and the second conductive area 413 are electrically connected through the fuse 412.

[0136] The first conductive area 411 is connected to the busbar 22, and the connection structure between the first conductive area 411 and the busbar 22 can be various, such as welding connection, clamping or abutting, and the like. Similarly, the second conductive area 413 is connected to the sampling line 31, and the connection structure between the second conductive area 413 and the sampling line 31 can also be various, such as welding connection, clamping or abutting, and the like. It should be noted that the second conductive area 413 and the conductor in the sampling line 31 are connected to each other to achieve the electrical connection between the sampling assembly 30 and the second conductive area 413.

[0137] Optionally, the two ends of the fuse 412 are connected to the first conductive area 411 and the second conductive area 413, respectively, and the fuse 412 is configured to be melted when the battery module 20 or the sampling assembly 30 is short-circuited, so as to disconnect the electrical connection between the sampling line 31 and the busbar 22. The structure of the fuse 412 can be various, the fuse 412, the first conductive area 411 and the second conductive area 413 can be an integrally formed structure, for example, the conductive layer 41 of the fuse device 40 is a composite foil structure or a single foil structure formed by different materials, and the conductive layer 41 is formed by an integrally forming process to sequentially connect the first conductive area 411, the fuse 412 and the second conductive area 413, such as stamping or cutting, and the like. Of course, the fuse 412, the first conductive area 411 and the second conductive area 413 can also be a separate structure, and the fuse 412 serves to connect the first conductive area 411 and the second conductive area 413. In this embodiment, the fuse 412 can be made of a low-melting-point metal or alloy, such as lead, tin, aluminum-magnesium alloy, gold wire, or lead-antimony alloy, and the like. Similarly, the connection structure between the fuse 412 and the first conductive area 411 and the second conductive area 413 can also be various, such as welding connection or clamping, and the like.

[0138] At least part of the first insulating layer 42 is located between the second conductive area 413 and the busbar component 22 to insulate and separate the second conductive area 413 and the busbar component 22, that is, the first insulating layer 42 and the conductive layer 41 are arranged in a stacked structure along the first direction X, and the first insulating layer 42 is located between the busbar component 22 and the conductive layer 41 in the first direction X, so that at least part of the first insulating layer 42 is located between the second conductive area 413 of the conductive layer 41 and the busbar component 22, so that the first insulating layer 42 can separate the second conductive area 413 and the busbar component 22.

[0139] Exemplarily, the material of the first insulating layer 42 can be various, for example, the material of the first insulating layer 42 can be rubber, silicone or plastic, etc.

[0140] In the embodiment, the busbar component 22 of the battery module 20 is provided with the fuse device 40, and the sampling line 31 of the sampling assembly 30 is electrically connected to the busbar component 22 through the fuse device 40, so that the sampling assembly 30 can acquire and sample the voltage of the battery module 20, so as to obtain the use condition of the battery 100. The fuse device 40 is provided with a conductive layer 41 and a first insulating layer 42, the conductive layer 41 includes a first conductive area 411, a fuse 412 and a second conductive area 413 connected in sequence, and the first conductive area 411 and the second conductive area 413 are connected with the busbar component 22 and the sampling line 31 respectively, so that the sampling line 31 of the sampling assembly 30 can be electrically connected to the busbar component 22 through the conductive layer 41. The battery 100 with such a structure can realize the following effects: on the one hand, when the battery module 20 is short-circuited or the sampling assembly 30 is short-circuited, the fuse 412 of the conductive layer 41 can be fused to disconnect the electrical connection between the first conductive area 411 and the second conductive area 413, so as to disconnect the battery module 20 and the sampling assembly 30, thereby relieving the further damage of the battery module 20 or the sampling assembly 30; on the other hand, by arranging the first insulating layer 42 between the conductive layer 41 and the busbar component 22, the first insulating layer 42 can separate the second conductive area 413 and the busbar component 22, thereby facilitating to increase the creepage distance between the second conductive area 413 and the busbar component 22, so as to reduce the risk of failure or short circuit of the fuse device 40 caused by the mislapped connection between the second conductive area 413 and the busbar component 22, and thus effectively improve the use stability and service life of the battery 100.

[0141] According to some embodiments of the present application, as shown in FIGS. 4, 5 and 6, the projection of the fuse device 40 is located in the busbar component 22 along the first direction X. That is, the busbar component 22 covers the fuse device 40 in the first direction X.

[0142] In the embodiment, by setting the projection of the fuse device 40 in the first direction X to be entirely located in the busbar component 22, on the one hand, the assembly stability of the fuse device 40 arranged on the busbar component 22 can be improved, so as to reduce the risk of the fuse device 40 falling off, and the knocking phenomenon between the fuse device 40 and other components can be alleviated; on the other hand, the lapping phenomenon between the conductive layer 41 of the fuse device 40 and other components can be reduced, so as to reduce the risk of internal short circuit of the battery 100 in use, and the use reliability of the battery 100 is improved.

[0143] According to some embodiments of the present application, referring to FIGS. 6, 7 and 8, the fuse device 40 can further include a second insulating layer 43, which is arranged and connected with the first insulating layer 42 in the first direction X. In the first direction X, the conductive layer 41 is arranged between the first insulating layer 42 and the second insulating layer 43.

[0144] The second insulating layer 43 is arranged and connected with the first insulating layer 42 in the first direction X, that is, the first insulating layer 42 and the second insulating layer 43 are arranged and connected in the first direction X, and the connection structure between the first insulating layer 42 and the second insulating layer 43 can be thermal composite connection or adhesion, etc. It should be noted that the thickness direction of the first insulating layer 42 and the thickness direction of the second insulating layer 43 are both the first direction X.

[0145] Exemplarily, the material of the second insulating layer 43 can be various, for example, the material of the second insulating layer 43 can be rubber, plastic or silicone, etc.

[0146] The conductive layer 41 is arranged between the first insulating layer 42 and the second insulating layer 43, that is, the first insulating layer 42 is located between the conductive layer 41 and the busbar component 22 in the first direction X, and the second insulating layer 43 is located on the side of the conductive layer 41 away from the busbar component 22, so that the first insulating layer 42 and the second insulating layer 43 are structures for clamping the conductive layer 41.

[0147] In this embodiment, the safety device 40 is further provided with a second insulating layer 43, and the second insulating layer 43 and the first insulating layer 42 are stacked and connected along the first direction X, so that the first insulating layer 42 and the second insulating layer 43 can clamp and assemble the conductive layer 41. The battery 100 with this structure can achieve insulation on both sides of the conductive layer 41 in the first direction X, which is conducive to further increasing the creepage distance between the conductive layer 41 and other components, and further reducing the overlap phenomenon between the conductive layer 41 and other components, thereby further reducing the risk of internal short circuit during use and improving the reliability of the battery 100. On the other hand, the first insulating layer 42 and the second insulating layer 43 can play a certain stabilizing role for the conductive layer 41, which is conducive to further improving the assembly stability of the safety device 40 on the busbar component 22.

[0148] According to some embodiments of this application, referring to Figures 7 and 8, and further referring to Figure 9, Figure 9 is a structural schematic diagram of the conductive layer 41 of the safety device 40 provided in some embodiments of this application. A gap 414 is formed between the first conductive region 411 and the second conductive region 413. Along the first direction X, the regions of the first insulating layer 42 and the second insulating layer 43 corresponding to the gap 414 are connected to each other to separate the first conductive region 411 and the second conductive region 413.

[0149] The gap 414 formed between the first conductive region 411 and the second conductive region 413 is the interval region between the first conductive region 411 and the second conductive region 413.

[0150] Along the first direction X, the regions of the first insulating layer 42 and the second insulating layer 43 corresponding to the gap 414 are connected to each other to separate the first conductive region 411 and the second conductive region 413. That is, the region of the first insulating layer 42 whose projection in the first direction X is located within the gap 414 is connected to the portion of the second insulating layer 43 whose projection in the first direction X is located within the gap 414, so as to form a first connecting portion located within the space of the gap 414, and the first connecting portion can separate the first conductive region 411 and the second conductive region 413.

[0151] In the embodiment, the first insulating layer 42 and the second insulating layer 43 are connected to each other at the portions corresponding to the gaps 414 between the first conductive areas 411 and the second conductive areas 413 in the first direction X, so that the first insulating layer 42 and the second insulating layer 43 can also insulate and separate the first conductive layer 41 and the second conductive layer 41, thereby achieving the physical separation between the first conductive areas 411 and the second conductive areas 413, increasing the creepage distance between the first conductive areas 411 and the second conductive areas 413, and further reducing the risk of misbonding between the first conductive areas 411 and the second conductive areas 413, which is conducive to reducing the risk of failure of the fuse device 40.

[0152] According to some embodiments of the present application, referring to FIGS. 7 and 8, the edge region of the first insulating layer 42 and the edge region of the second insulating layer 43 are connected to each other, and the first insulating layer 42 and the second insulating layer 43 jointly define a receiving space in which the conductive layer 41 is received.

[0153] In the embodiment, the edge region of the first insulating layer 42 and the edge region of the second insulating layer 43 are connected to each other, that is, the region near the outer edge of the first insulating layer 42 and the region near the outer edge of the second insulating layer 43 are connected to each other to form a second connecting portion in a ring structure.

[0154] The first insulating layer 42 and the second insulating layer 43 jointly define a receiving space in which the conductive layer 41 is received, that is, the second connecting portion formed by the connection of the first insulating layer 42 and the second insulating layer 43 is a structure surrounding the outer side of the conductive layer 41, that is, the projection of the conductive layer 41 in the first direction X is located within the outer edge of the first insulating layer 42, and the projection of the conductive layer 41 in the first direction X is located within the outer edge of the second insulating layer 43, so that the edge region of the first insulating layer 42 and the edge region of the second insulating layer 43 are connected to each other to form a receiving member for receiving the conductive layer 41.

[0155] In the embodiment, the edge region of the first insulating layer 42 and the edge region of the second insulating layer 43 are connected to each other, so that the first insulating layer 42 and the second insulating layer 43 can jointly form a receiving space for receiving the conductive layer 41. This structure of the battery 100 can further reduce the bonding phenomenon between the conductive layer 41 and other components, thereby further reducing the risk of internal short circuit of the battery 100 during use, improving the use reliability of the battery 100, further improving the stability of the first insulating layer 42 and the second insulating layer 43 to the conductive layer 41, which is conducive to improving the structural stability of the fuse device 40, and further improving the assembly stability of the fuse device 40 arranged on the busbar component 22.

[0156] According to some embodiments of the present application, referring to FIG. 8 and FIG. 9, and further referring to FIG. 10, which is a front view of the protection device 40 facing the first insulating layer 42 in the first direction X according to some embodiments of the present application. The first insulating layer 42 is provided with a first window 421, which is configured to expose a portion of the first conductive region 411, and the exposed portion of the first conductive region 411 is connected to the busbar component 22.

[0157] The first window 421 is a through-hole structure provided on the first insulating layer 42, and the first window 421 penetrates the surfaces of both sides of the first insulating layer 42 in the first direction X.

[0158] The first window 421 is configured to expose a portion of the first conductive region 411, and the exposed portion of the first conductive region 411 is connected to the busbar component 22, that is, the projection of the first conductive region 411 in the first direction X is located within the first window 421, and the region of the first conductive region 411 corresponding to the first window 421 in the first direction X is connected to the busbar component 22.

[0159] In the present embodiment, the first window 421 is provided on the first insulating layer 42, and the first window 421 can expose a portion of the first conductive region 411 of the conductive layer 41 in the first direction X, thereby facilitating the connection between the busbar component 22 and the exposed region of the first conductive region 411, and reducing the difficulty of connecting the busbar component 22 and the first conductive region 411, and improving the connection quality between the busbar component 22 and the first conductive region 411.

[0160] In some embodiments, referring to FIG. 10, the projection of the first window 421 in the first direction X is located within the first conductive region 411. That is, the projection of the first window 421 in the first direction X is located within the edge of the first conductive region 411, and vice versa, the first conductive region 411 covers the first window 421 in the first direction X.

[0161] In the present embodiment, by setting the projection of the first window 421 in the first direction X to be located entirely within the first conductive region 411, on the one hand, it can alleviate the phenomenon of the exposed region of the first conductive region 411 being too large, thereby reducing the risk of lap joint between the first conductive region 411 and other components, and on the other hand, it can alleviate the phenomenon of the edge of the first conductive region 411 being exposed, thereby improving the stability of the first conductive region 411 assembled between the first insulating layer 42 and the second insulating layer 43, and thereby reducing the risk of the first conductive region 411 falling off from the first window 421.

[0162] According to some embodiments of the present application, referring to FIG. 8, FIG. 9 and FIG. 10, and further referring to FIG. 11, which is a front view of the safety device 40 facing the second insulating layer 43 in the first direction X according to some embodiments of the present application. The first conductive area 411 is welded to the busbar component 22, and the second insulating layer 43 is provided with a second window 431 configured to expose a portion of the first conductive area 411. At least a portion of the projection of the second window 431 and the first window 421 in the first direction X overlaps.

[0163] wherein the second window 431 is a through-hole structure provided on the second insulating layer 43, and the second window 431 penetrates the surfaces of both sides of the second insulating layer 43 along the first direction X.

[0164] The second window 431 is configured to expose a portion of the first conductive area 411, that is, a portion of the projection of the first conductive area 411 in the first direction X is located within the second window 431.

[0165] At least a portion of the projection of the second window 431 and the first window 421 in the first direction X overlaps, that is, a portion of the projection of the first conductive area 411 in the first direction X is located within both the first window 421 and the second window 431, so that the portion of the projection of the first conductive area 411 in the first direction X that is located within both the first window 421 and the second window 431 is welded to the busbar component 22.

[0166] In the present embodiment, by providing the second window 431 on the second insulating layer 43 capable of exposing a portion of the first conductive area 411, and at least a portion of the projection of the second window 431 in the first direction X is located within the first window 421, so that the first conductive area 411 and the busbar component 22 can be welded from the side of the first conductive area 411 away from the busbar component 22 and corresponding to the position of the second window 431. On the one hand, it can reduce the difficulty of welding the first conductive area 411 and the busbar component 22 to each other, so as to improve the assembly efficiency of the battery 100. On the other hand, it can realize that the second insulating layer 43 does not need to be penetrated when welding the first conductive area 411 and the busbar component 22, which is conducive to reducing the welding power required for welding the first conductive area 411 and the busbar component 22, and can effectively improve the welding quality between the first conductive area 411 and the busbar component 22.

[0167] In some embodiments, referring to FIG. 8, the projection of the second window 431 and the first window 421 in the first direction X overlaps each other. That is, the shape and size of the first window 421 and the second window 431 are the same, and the position in the first direction X is also the same, that is, the portion of the projection of the first conductive area 411 in the first direction X located within the first window 421 is also located within the second window 431.

[0168] In the embodiment, by setting the second window 431 and the first window 421 as the structures whose projections are coincident in the first direction X, the difficulty of welding the first conductive area 411 and the busbar component 22 to each other is further reduced, and the assembly efficiency of the battery 100 is improved, without the need to position the overlapping area of the second window 431 and the first window 421 in the first direction X when welding the first conductive area 411 and the busbar component 22.

[0169] In some embodiments, referring to FIG. 11, along the first direction X, the projection of the second window 431 is located in the first conductive area 411. That is, the projection of the second window 431 in the first direction X is located in the edge of the first conductive area 411, and vice versa, the first conductive area 411 covers the second window 431 in the first direction X.

[0170] In the embodiment, by setting the projection of the second window 431 in the first direction X as a whole located in the first conductive area 411, on the one hand, the phenomenon that the exposed area of the first conductive area 411 is too large is alleviated, so as to reduce the risk of lap between the first conductive area 411 and other components, and on the other hand, the phenomenon that the edge of the first conductive area 411 is exposed is alleviated, which is beneficial to improve the stability of the first conductive area 411 assembled and arranged between the first insulating layer 42 and the second insulating layer 43, so as to reduce the risk of the first conductive area 411 falling off from the second window 431.

[0171] According to some embodiments of the present application, referring to FIGS. 7, 8 and 11, the second insulating layer 43 is provided with a third window 432, and the third window 432 is configured to expose part of the second conductive area 413, and the exposed part of the second conductive area 413 is connected with the sampling line 31.

[0172] The third window 432 is a through-hole structure provided on the second insulating layer 43, and the third window 432 penetrates the surfaces of the two sides of the second insulating layer 43 along the first direction X.

[0173] The third window 432 is configured to expose part of the second conductive area 413, and the exposed part of the second conductive area 413 is connected with the sampling line 31, that is, part of the projection of the second conductive area 413 in the first direction X is located in the third window 432, and the area of the second conductive area 413 corresponding to the third window 432 in the first direction X is connected with the conductor of the sampling line 31.

[0174] In the embodiment, the third window 432 is arranged on the second insulating layer 43, and the third window 432 can expose a part of the second conductive area 413 of the conductive layer 41 in the first direction X, so as to facilitate the mutual connection between the sampling line 31 and the area of the second conductive area 413 exposed, and to facilitate the reduction of the connection difficulty between the sampling line 31 and the second conductive area 413, and to facilitate the improvement of the connection quality between the sampling line 31 and the second conductive area 413.

[0175] In some embodiments, referring to FIG. 11, in the first direction X, the projection of the third window 432 is located in the second conductive area 413. That is, the projection of the third window 432 in the first direction X is located in the edge of the second conductive area 413, and vice versa, the second conductive area 413 covers the third window 432 in the first direction X.

[0176] In the embodiment, by arranging the projection of the third window 432 in the first direction X to be located in the second conductive area 413, on the one hand, the phenomenon that the area of the second conductive area 413 exposed is too large can be alleviated, so as to reduce the risk of lap between the second conductive area 413 and other components, and on the other hand, the phenomenon that the edge of the second conductive area 413 is exposed can be alleviated, so as to facilitate the improvement of the stability of the second conductive area 413 arranged between the first insulating layer 42 and the second insulating layer 43, thereby reducing the risk of the second conductive area 413 falling off from the third window 432.

[0177] According to some embodiments of the present application, the first insulating layer 42 and the second insulating layer 43 are connected by thermal compounding. That is, the first insulating layer 42 and the second insulating layer 43 are connected to each other by a thermal pressing process.

[0178] Of course, in other embodiments, the first insulating layer 42 and the second insulating layer 43 can also be bonded to each other by double-sided adhesive tape or glue.

[0179] In the embodiment, the first insulating layer 42 and the second insulating layer 43 are connected by thermal compounding, on the one hand, the connection firmness of the first insulating layer 42 and the second insulating layer 43 can be improved, so as to improve the structural stability and reliability of the conductive layer 41 arranged between the first insulating layer 42 and the second insulating layer 43, and on the other hand, the assembly difficulty of the first insulating layer 42 and the second insulating layer 43 can be reduced, so as to improve the assembly efficiency of the safety device 40.

[0180] According to some embodiments of the present application, referring to FIGS. 5, 7 and 8, the first conductive area 411 is welded to the busbar component 22, and the second conductive area 413 is welded to the sampling line 31.

[0181] Exemplarily, the first conductive region 411 and the busbar component 22 are connected by laser welding, and the second conductive region 413 and the conductor of the sampling line 31 are connected by soldering.

[0182] In this embodiment, by setting the first conductive region 411 and the busbar component 22 in a structure of being welded to each other, the connection reliability between the first conductive region 411 and the busbar component 22 is improved, the risk of the fuse device 40 failing due to the first conductive region 411 and the busbar component 22 being separated from each other is reduced, and the overcurrent capacity between the first conductive region 411 and the busbar component 22 is improved. Similarly, by setting the second conductive region 413 and the sampling line 31 in a structure of being welded to each other, the connection reliability between the second conductive region 413 and the sampling line 31 is improved, the risk of the fuse device 40 failing due to the second conductive region 413 and the sampling line 31 being separated from each other is reduced, and the overcurrent capacity between the second conductive region 413 and the sampling line 31 is improved.

[0183] According to some embodiments of the present application, referring to FIG. 9, and further referring to FIG. 12, which is a sectional view of the conductive layer 41 of the fuse device 40 provided by some embodiments of the present application, perpendicular to the second direction Y. The conductive layer 41 includes the first foil 415 and the second foil 416 which are connected in composite along the first direction X, the first foil 415 is located on the side of the second foil 416 facing the busbar component 22 in the first direction X, the first foil 415 is welded to the busbar component 22 at the part of the first conductive region 411, and the second foil 416 is welded to the sampling line 31 at the part of the second conductive region 413. The material of the busbar component 22 is different from the material of the sampling line 31, the material of the first foil 415 is the same as the material of the busbar component 22, and the material of the second foil 416 is the same as the material of the sampling line 31.

[0184] In this embodiment, the first conductive region 411, the fuse 412, and the second conductive region 413 are structures formed by the one-piece forming process of the conductive layer 41 in the composite foil structure, for example, the conductive layer 41 in the composite foil is formed by the one-piece forming process such as stamping or cutting to form the first conductive region 411, the fuse 412, and the second conductive region 413 connected in sequence, so that the first conductive region 411, the fuse 412, and the second conductive region 413 all include the first foil 415 and the second foil 416 connected in composite along the first direction X.

[0185] It should be noted that, in this embodiment, the first conductive region 411, the fuse 412, and the second conductive region 413 are structures formed by the one-piece forming process of the conductive layer 41 in the composite foil structure, for example, the conductive layer 41 in the composite foil is formed by the one-piece forming process such as stamping or cutting to form the first conductive region 411, the fuse 412, and the second conductive region 413 connected in sequence, so that the first conductive region 411, the fuse 412, and the second conductive region 413 all include the first foil 415 and the second foil 416 connected in composite along the first direction X.

[0186] The first foil 415 is located on the side of the second foil 416 facing the busbar component 22 in the first direction X, that is, the first foil 415 and the second foil 416 of the conductive layer 41 are in a stacked structure along the first direction X, and the first foil 415 is located on the side of the second foil 416 facing the busbar component 22.

[0187] The first foil 415 is welded to the busbar component 22 at the portion of the first conductive area 411, that is, the first foil 415 in the first conductive area 411 is welded to the busbar component 22. Similarly, the second foil 416 is welded to the sampling line 31 at the portion of the second conductive area 413, that is, the second foil 416 in the second conductive area 413 is welded to the conductor of the sampling line 31.

[0188] It should be noted that the same material of the first foil 415 and the busbar component 22 means that the main components of the first foil 415 and the busbar component 22 are the same, for example, if the first foil 415 and the busbar component 22 are single materials, such as copper or aluminum, then the first foil 415 and the busbar component 22 are composed of the same metal elements; if the first foil 415 and the busbar component 22 are alloy materials or mixed materials, such as aluminum alloy or steel, then the same material of the first foil 415 and the busbar component 22 means that the main components of the first foil 415 and the busbar component 22 are the same, and if the first foil 415 and the busbar component 22 only differ in the content of the components, they are also the same material. Similarly, the same material of the second foil 416 and the conductor of the sampling line 31 means that the main components of the second foil 416 and the conductor of the sampling line 31 are the same, for example, if the second foil 416 and the conductor of the sampling line 31 are single materials, such as copper or aluminum, then the second foil 416 and the conductor of the sampling line 31 are composed of the same metal elements; if the second foil 416 and the conductor of the sampling line 31 are alloy materials or mixed materials, such as aluminum alloy or steel, then the same material of the second foil 416 and the conductor of the sampling line 31 means that the main components of the second foil 416 and the conductor of the sampling line 31 are the same, and if the second foil 416 and the conductor of the sampling line 31 only differ in the content of the components, they are also the same material. Conversely, the different materials of the busbar component 22 and the conductor of the sampling line 31 mean that the main components of the busbar component 22 and the conductor of the sampling line 31 are different, for example, if the busbar component 22 and the conductor of the sampling line 31 are single materials, such as copper or aluminum, then the busbar component 22 and the conductor of the sampling line 31 are composed of different metal elements; if the busbar component 22 and the conductor of the sampling line 31 are alloy materials or mixed materials, such as aluminum alloy or steel, then the different materials of the busbar component 22 and the conductor of the sampling line 31 mean that the main components of the busbar component 22 and the conductor of the sampling line 31 are different.

[0189] Exemplarily, the material of the busbar component 22 and the first foil 415 is aluminum, and of course, in other embodiments, the material of the busbar component 22 and the first foil 415 can also be copper or alloy, etc.

[0190] Exemplarily, the material of the conductor of the sampling line 31 and the second foil 416 is copper, and of course, in other embodiments, the material of the conductor of the sampling line 31 and the second foil 416 can also be aluminum or alloy, etc.

[0191] In the embodiment, the conductive layer 41 is provided with the first foil 415 and the second foil 416 which are connected in the first direction X, and the first foil 415 is located on the side of the second foil 416 facing the busbar component 22 in the first direction X. By setting the material of the first foil 415 to be the same as that of the busbar component 22, and by welding the part of the first foil 415 located in the first conductive area 411 to the busbar component 22, and by setting the material of the second foil 416 to be the same as that of the sampling line 31, and by welding the part of the second foil 416 located in the second conductive area 413 to the sampling line 31, the structure that the first conductive area 411 and the busbar component 22 are welded and connected in the same material, and the structure that the second conductive area 413 and the sampling line 31 are welded and connected in the same material are realized. On the one hand, the welding difficulty between the first conductive area 411 and the busbar component 22 and between the second conductive area 413 and the sampling line 31 is reduced, and on the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, which is beneficial to improving the welding quality between the first conductive area 411 and the busbar component 22 and between the second conductive area 413 and the sampling line 31.

[0192] Of course, in other embodiments, the fuse device 40 can also be other structures, for example, the materials of the conductive layer 41, the busbar component 22 and the sampling line 31 are the same. That is, the first conductive area 411, the fuse 412 and the second conductive area 413 of the conductive layer 41, and the conductors of the busbar component 22 and the sampling line 31 are structures formed by the same material.

[0193] Exemplarily, the conductive layer 41, the busbar component 22 and the conductor of the sampling line 31 can all be copper or aluminum, etc.

[0194] It should be noted that in such an embodiment, the first conductive area 411, the fuse 412 and the second conductive area 413 of the conductive layer 41 can be a structure integrally formed by a single foil, or can be a structure separately provided, and the connection structure between the fuse 412 and the first conductive area 411 and the second conductive area 413 can be various, such as welding connection or clamping, etc.

[0195] In the embodiment, by setting the conductive layer 41 of the safety device 40, the busbar component 22 and the sampling line 31 to be structures of the same material, a structure in which the first conductive area 411 and the busbar component 22 and the second conductive area 413 and the sampling line 31 are welded and connected in the same material is realized. On the one hand, the welding difficulty between the first conductive area 411 and the busbar component 22 and the second conductive area 413 and the sampling line 31 is reduced. On the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, which is beneficial to improving the welding quality between the first conductive area 411 and the busbar component 22 and the second conductive area 413 and the sampling line 31.

[0196] It should be noted that the structure of the safety device 40 is not limited in sequence. In some embodiments, the safety device 40 can also be other structures, for example, the material of the busbar component 22 is different from the material of the sampling line 31, the material of the first conductive area 411 is the same as the material of the busbar component 22, and the material of the second conductive area 413 is the same as the material of the conductor of the sampling line 31.

[0197] Among them, the first conductive area 411, the fuse 412 and the second conductive area 413 of the conductive layer 41 are structures arranged in sequence, the fuse 412 connects the first conductive area 411 and the second conductive area 413, the first conductive area 411 is a structure of the same material as the busbar component 22, and the second conductive area 413 is a structure of the same material as the conductor of the sampling line 31. In this embodiment, the fuse 412 can be the same material as the first conductive area 411, can be the same material as the second conductive area 413, or can be a structure different from the materials of the first conductive area 411 and the second conductive area 413.

[0198] In the embodiment, by setting the material of the first conductive area 411 of the conductive layer 41 to be the same as the material of the busbar component 22 and setting the material of the second conductive area 413 of the conductive layer 41 to be the same as the material of the sampling line 31, a structure in which the first conductive area 411 and the busbar component 22 are welded and connected in the same material is realized, and a structure in which the second conductive area 413 and the sampling line 31 are welded and connected in the same material is realized. On the one hand, the welding difficulty between the first conductive area 411 and the busbar component 22 and the second conductive area 413 and the sampling line 31 is reduced. On the other hand, the quality problem caused by the mutual welding connection between different materials is alleviated, which is beneficial to improving the welding quality between the first conductive area 411 and the busbar component 22 and the second conductive area 413 and the sampling line 31.

[0199] According to some embodiments of the present application, referring to FIGS. 8 and 9, the first conductive region 411 includes a first portion 4111, a second portion 4112 and a third portion 4113 connected in sequence, and the first portion 4111 and the third portion 4113 are oppositely arranged along a second direction Y, which is perpendicular to the first direction X.

[0200] The first conductive region 411 includes a first portion 4111, a second portion 4112 and a third portion 4113 connected in sequence, that is, one end of the second portion 4112 is connected to one end of the first portion 4111, and the other end of the second portion 4112 is connected to one end of the third portion 4113.

[0201] For example, the second portion 4112 extends along the second direction Y, and the two ends of the second portion 4112 in the second direction Y are connected to the first portion 4111 and the third portion 4113 respectively, and the first portion 4111 and the third portion 4113 both extend along a third direction Z.

[0202] For example, in FIG. 9, the first portion 4111, the second portion 4112 and the third portion 4113 of the first conductive region 411 are integrally formed, and of course, in other embodiments, the first portion 4111, the second portion 4112 and the third portion 4113 can also be separately arranged.

[0203] It should be noted that in the embodiments in which the first insulating layer 42 is provided with the first window 421 and the second insulating layer 43 is provided with the second window 431, the first window 421 is also a "C" shaped structure with the same shape as the first conductive region 411, and similarly, the second window 431 is also a "C" shaped structure with the same shape as the first conductive region 411, so as to improve the welding area between the first conductive region 411 and the busbar component 22.

[0204] In the present embodiment, by arranging the first conductive region 411 as the first portion 4111, the second portion 4112 and the third portion 4113 connected in sequence, and oppositely arranging the first portion 4111 and the third portion 4113 along the second direction Y, the first conductive region 411 is formed as a "C" shaped structure, and the fuse device 40 adopting such structure can increase the effective welding area between the first conductive region 411 of the conductive layer 41 and the busbar component 22, and further improve the assembly stability of the fuse device 40 arranged on the busbar component 22.

[0205] In some embodiments, referring to FIG. 9, along the second direction Y, the second conductive region 413 is located between the first portion 4111 and the third portion 4113, and the two ends of the fuse 412 are connected to the second conductive region 413 and the third portion 4113 respectively.

[0206] The second conductive region 413 is located between the first portion 4111 and the third portion 4113 in the second direction Y, and is spaced apart from the first portion 4111, the second portion 4112, and the third portion 4113.

[0207] In the embodiment, by setting the second conductive region 413 of the conductive layer 41 to be located between the first portion 4111 and the third portion 4113 in the second direction Y, the second conductive region 413 is located inside the first conductive region 411, the fuse device 40 with this structure can optimize the space occupied by the conductive layer 41, improve the overall structural strength of the fuse device 40, and reduce the difficulty of connecting the first conductive region 411 and the second conductive region 413 of the fuse 412.

[0208] According to some embodiments of the present application, as shown in FIGS. 2, 3, 4, and 5, along the first direction X, the busbar component 22 is connected to one side of the battery monomer 21, and the fuse device 40 is arranged on the side of the busbar component 22 away from the battery monomer 21.

[0209] The busbar component 22 is located on one side of the plurality of battery monomers 21 in the first direction X, and correspondingly, the sampling assembly 30 is located on the side of the battery module 20 where the busbar component 22 is arranged.

[0210] The fuse device 40 is arranged on the side of the busbar component 22 away from the battery monomer 21, that is, the busbar component 22 is arranged between the fuse device 40 and the battery monomer 21 in the first direction X. Of course, in other embodiments, the fuse device 40 can also be arranged on the side of the busbar component 22 facing the battery monomer 21.

[0211] In the embodiment, by connecting the busbar component 22 to one side of the battery monomer 21 in the first direction X, and arranging the fuse device 40 on the side of the busbar component 22 away from the battery monomer 21 in the first direction X, it is beneficial to reduce the assembly difficulty between the fuse device 40 and the busbar component 22, and to reduce the connection difficulty between the sampling line 31 and the fuse device 40, thereby improving the assembly efficiency of the battery 100.

[0212] In some embodiments, the battery 100 can further include an insulating piece 50, which is arranged between the sampling assembly 30 and the plurality of battery monomers 21 of the battery module 20 in the first direction X, to insulate and isolate the sampling assembly 30 and the battery monomer 21, thereby reducing the risk of short circuit between the sampling assembly 30 and the battery module 20.

[0213] Exemplarily, the thickness direction of the insulating member 50 is the first direction X, and the material of the insulating member 50 can be various, for example, the material of the insulating member 50 can be rubber, silica gel or plastic, etc.

[0214] According to some embodiments of the present application, the present application also provides a power-using device, the power-using device comprising the battery 100 of any one of the above solutions, and the battery 100 is used to provide electric energy for the power-using device.

[0215] Among them, the power-using device can be the device or system of any one of the above application batteries 100.

[0216] According to some embodiments of the present application, referring to FIGS. 2-12, the present application provides a battery 100, which includes a battery module 20, an insurance device 40, and a sampling assembly 30. The battery module 20 includes a busbar component 22 and a plurality of battery cells 21, the busbar component 22 is located on one side of the plurality of battery cells 21 in a first direction X, and the busbar component 22 connects the plurality of battery cells 21 to electrically connect the plurality of battery cells 21, the plurality of battery cells 21 are arranged in a second direction Y. The insurance device 40 is arranged on the side of the busbar component 22 away from the battery cells 21 in the first direction X, and the sampling assembly 30 is arranged on the side of the battery module 20 provided with the busbar component 22 in the first direction X, the sampling assembly 30 has a sampling line 31, the sampling line 31 is electrically connected to the busbar component 22 through the insurance device 40. The projection of the insurance device 40 in the first direction X is located in the busbar component 22, the insurance device 40 includes a conductive layer 41, a first insulating layer 42, and a second insulating layer 43, the first insulating layer 42 and the second insulating layer 43 are arranged in a stack and connected in the first direction X, the first insulating layer 42 and the second insulating layer 43 are thermally compounded and connected, the conductive layer 41 is arranged between the first insulating layer 42 and the second insulating layer 43 in the first direction X, at least part of the first insulating layer 42 is located between the second conductive area 413 and the busbar component 22 to insulate and separate the second conductive area 413 and the busbar component 22. The conductive layer 41 includes a first conductive area 411, a fuse 412, and a second conductive area 413, the first conductive area 411 and the second conductive area 413 are arranged in a spaced manner, the first conductive area 411 is connected to the busbar component 22, the second conductive area 413 is connected to the sampling line 31, and the fuse 412 connects the first conductive area 411 and the second conductive area 413. A gap 414 is formed between the first conductive area 411 and the second conductive area 413, the first insulating layer 42 and the second insulating layer 43 are connected to each other in the region corresponding to the gap 414 in the first direction X to separate the first conductive area 411 and the second conductive area 413, and the edge region of the first insulating layer 42 and the edge region of the second insulating layer 43 are connected to each other, the first insulating layer 42 and the second insulating layer 43 together define an accommodation space, and the conductive layer 41 is accommodated in the accommodation space. The first insulating layer 42 is provided with a first window 421, the first window 421 is configured to expose part of the first conductive area 411, the exposed part of the first conductive area 411 is connected to the busbar component 22, and the first conductive area 411 is welded to the busbar component 22. The second insulating layer 43 is provided with a second window 431, the second window 431 is configured to expose part of the first conductive area 411, and the projections of the first window 421 and the second window 431 in the first direction X coincide with each other. In the first direction X, the projections of the first window 421 and the second window 431 are located in the first conductive area 411.The second insulating layer 43 is provided with a third window 432 configured to expose a portion of the second conductive region 413, and the exposed portion of the second conductive region 413 is connected to the conductor of the sampling line 31. In the first direction X, a projection of the third window 432 is located in the second conductive region 413. The first conductive region 411 includes a first portion 4111, a second portion 4112 and a third portion 4113 connected in sequence, the first portion 4111 and the third portion 4113 are oppositely arranged in the second direction Y, the second direction Y is perpendicular to the first direction X, in the second direction Y, the second conductive region 413 is located between the first portion 4111 and the third portion 4113, and the two ends of the fuse 412 are connected to the second conductive region 413 and the third portion 4113, respectively. The first conductive region 411 is welded to the busbar component 22, the second conductive region 413 is welded to the sampling line 31, the conductive layer 41 includes a first foil 415 and a second foil 416 connected in the first direction X, the first foil 415 is located on the side of the second foil 416 facing the busbar component 22 in the first direction X, the first foil 415 is welded to the portion of the first conductive region 411 and the busbar component 22, the second foil 416 is welded to the portion of the second conductive region 413 and the conductor of the sampling line 31, the material of the busbar component 22 is different from the material of the sampling line 31, the material of the first foil 415 is the same as the material of the busbar component 22, and the material of the second foil 416 is the same as the material of the conductor of the sampling line 31.

[0217] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict.

[0218] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, comprising: A battery module includes a current collector and multiple battery cells, wherein the current collector is electrically connected to the multiple battery cells; A safety device is stacked with the busbar component along a first direction; as well as A sampling assembly having a sampling line, the sampling line being electrically connected to the busbar via the safety device; The safety device includes a conductive layer and a first insulating layer. The conductive layer includes a first conductive region, a fuse, and a second conductive region. The first conductive region and the second conductive region are spaced apart. The first conductive region is connected to the busbar component, and the second conductive region is connected to the sampling line. The fuse connects the first conductive region and the second conductive region. Along the first direction, at least a portion of the first insulating layer is located between the second conductive region and the busbar component to insulate and isolate the second conductive region and the busbar component.

2. The battery according to claim 1, wherein, Along the first direction, the projection of the safety device is located within the busbar component.

3. The battery according to claim 1 or 2, wherein, The safety device also includes: The second insulating layer is stacked and connected to the first insulating layer along the first direction; Wherein, along the first direction, the conductive layer is disposed between the first insulating layer and the second insulating layer.

4. The battery according to claim 3, wherein, A gap is formed between the first conductive region and the second conductive region; Along the first direction, the regions of the first insulating layer and the second insulating layer corresponding to the gap are connected to each other to separate the first conductive region and the second conductive region.

5. The battery according to claim 3 or 4, wherein, The edge regions of the first insulating layer and the edge regions of the second insulating layer are connected to each other, and the first insulating layer and the second insulating layer together define a receiving space, in which the conductive layer is received.

6. The battery according to claim 5, wherein, The first insulating layer is provided with a first window, which is configured to expose a portion of the first conductive area, and the exposed portion of the first conductive area is connected to the busbar component.

7. The battery according to claim 6, wherein, Along the first direction, the projection of the first window lies within the first conductive region.

8. The battery according to claim 6 or 7, wherein, The first conductive area is welded to the bus component, and the second insulating layer is provided with a second window, which is configured to expose a portion of the first conductive area. Wherein, the projections of the second window and the first window in the first direction at least partially overlap.

9. The battery according to claim 8, wherein, The projections of the second window and the first window in the first direction coincide.

10. The battery according to claim 8 or 9, wherein, Along the first direction, the projection of the second window lies within the first conductive region.

11. The battery according to any one of claims 5-10, wherein, The second insulating layer is provided with a third window, which is configured to expose a portion of the second conductive area, and the exposed portion of the second conductive area is connected to the sampling line.

12. The battery according to claim 11, wherein, Along the first direction, the projection of the third window is located within the second conductive region.

13. The battery according to any one of claims 3-12, wherein, The first insulating layer and the second insulating layer are thermally bonded together.

14. The battery according to any one of claims 1-13, wherein, The first conductive area is welded to the busbar component, and the second conductive area is welded to the sampling line.

15. The battery according to claim 14, wherein, The conductive layer includes a first foil and a second foil compositely connected along the first direction. The first foil is located on the side of the second foil facing the busbar in the first direction. The portion of the first foil located in the first conductive area is welded to the busbar, and the portion of the second foil located in the second conductive area is welded to the sampling line. The material of the busbar component is different from that of the sampling line, the material of the first foil is the same as that of the busbar component, and the material of the second foil is the same as that of the sampling line.

16. The battery according to claim 14, wherein, The conductive layer, the busbar component, and the sampling line are all made of the same material.

17. The battery according to claim 14, wherein, The material of the busbar component is different from that of the sampling line, the material of the first conductive area is the same as that of the busbar component, and the material of the second conductive area is the same as that of the sampling line.

18. The battery according to any one of claims 1-17, wherein, The first conductive region includes a first part, a second part, and a third part connected in sequence. The first part and the third part are arranged opposite each other along a second direction, which is perpendicular to the first direction.

19. The battery according to claim 18, wherein, Along the second direction, the second conductive area is located between the first part and the third part, and the two ends of the fuse are respectively connected to the second conductive area and the third part.

20. The battery according to any one of claims 1-19, wherein, Along the first direction, the busbar is connected to one side of the battery cell, and the safety device is disposed on the side of the busbar opposite to the battery cell.

21. An electrical device comprising a battery as claimed in any one of claims 1-20, the battery being used to provide electrical energy.

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